Abstract
Seaweed cultivation in Pahawang Island waters have a serious problem like predators from Baronang fish and sea turtle, strong current and big waves also give big impact for seaweed cultivation at there. Bag nets is one of method who can be a solution for that problems. The aim of this research are want to know about daily growth rate (DGR) and absolute growth rate (AGR) from seaweed E. Spinosum . This research has been done in August – September 2019. The net bags was designed to be strong enough for protect seaweed from predation and strong current at there. The net bags prepared are 56 nets, with initial weight of seaweed 50 grams. The result of this research show the daily growth rate (DGR) was 5.6 % each day and for absolute growth rate (AGR) was 304.9 grams. The growth rate is good enough because growth more than 2% each day.
Highlights
Indonesia is one of the world's richest nations in terms of seaweed diversity, some of seaweed in indonesia have high economic value such as Eucheuma sp, Gracilaria sp, Gelidium sp, Sargassum sp, Caulerpa sp and Turbinaria spp
Seaweed cultivation in Pahawang Island waters have a serious problem like predators from Baronang fish and sea turtle, strong current and big waves give big impact for seaweed cultivation at there
The aim of this research are want to know about daily growth rate (DGR) and absolute growth rate (AGR) from seaweed E
Summary
Indonesia is one of the world's richest nations in terms of seaweed diversity, some of seaweed in indonesia have high economic value such as Eucheuma sp, Gracilaria sp, Gelidium sp, Sargassum sp, Caulerpa sp and Turbinaria spp. Methods that have been developed in seaweed cultivation such as the long line method, the floating raft method, the off-bottom method (Hendri et al, 2017; Hendri et al, 2018; Hendri et al, 2020) These method before have a several weakness, like can’t protect fully and have potential to attacked from predators like baronang fish, sea turtle and others. Besides that, these method can’t applied in open waters who have strong current and big waves because part of seaweed (thalus) can broke, predators can make seaweed broke and it can be a disease for seaweed. Needed new method for cultivation seaweed to handle seaweed from strong current, big waves and predators
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